BST

Purpose of the program

The BST package (The Batch Stirred Tank) belongs to the Thermal Safety Software (TSS) series. It is intended for computer simulation of physical and chemical processes that are proceed in well-stirred batch tanks equipped with emergency pressure relief systems, and calculation of a proper size of a vent system that provides prevention of tank bursting  rupture in case of a runaway reaction (accident).

The DIERS methodology is used for simulation of gas-liquid mixture flowing out of the tank. Simulation of chemical reactions is implemented on the basis of formal and descriptive kinetic models that can be created by the ForK and DesK programs respectively.

The convenient project-oriented interface facilitates DesK application.

The BST 4x package comprises:

• the BST server which manages projects and controls the interaction between the modules; it includes the BST module which implements simulation of the processes in a tank;
• the VENT module for calculation of two-phase flow through a complex multi-segment pipeline (ERS);
• the MIXTURE  software for calculation of physical and chemical properties of multi-component liquid and gas/vapor mixtures.

Handling data

BST is based on the project concept. A project unites all the data necessary for simulation. A BST project contains data on reactor, kinetic model, parameters of simulation, and results. In addition it includes the references to the corresponding VENT and MIXTURE projects. Every separate project is saved in a data volume of the appropriate data base – of BST, VENT and MIXTURE.

BST provides direct access to the ForK and DesK data bases which allows easy import of kinetic models  created by using ForK or DesK.

Kinetic models

BST can use both formal models based on conversions as state variables and descriptive models based on concentrations. Kinetic models can be imported from ForK and DesK programs or created manually when working with BST.

Main features of BST

Reactor type

• jacketed reactor having the shape of a sphere, vertical or horizontal cylinder;
• flow models in a reactor: Bubble, Churn turbulent, Foam;

Emergency relief system:

• top or bottom positioned multi segment vent line including one safety device (rupture disk of valve);
• flow models in a pipeline: one- or two-phase homogeneous equilibrium or frozen for nozzle; homogeneous equilibrium or non-equilibrium for pipes;
• a pipe may be constructed from up to 256 hydraulic elements – straight pipes, elbows, expanders and contructors.

Installation

BST 4.2x and higher is compatible with Windows 2000/XP/VISTA/7.

ATTENTION!

• When installing the BST package the order of installation should be as follows: MIXTURE, VENT and then BST!
• When installing BST under Windows 7 the recommended path is C:\Users\[username]

 Requirements:

CPU: Intel Pentium 1200 MHz and faster

Memory: 512 MB

Disk space: 50 MB

CD-ROM: present

OS: MS Windows 2000, XP, VISTA, 7